✨ Add Laravel guidelines, Spanish translations, and configuration updates

- Added Laravel Boost Guidelines for structured development practices.
- Introduced Spanish translations for `auth`, `passwords`, and additional JSON keys.
- Configured markdown highlighting with Shiki in `config/markdown.php`.
- Updated sidebar layout for improved interactivity and styling.
- Enhanced user feedback with a copy-to-clipboard directive and toast notifications in Flux.

lang/es/pagination.php

@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+return [
+    'next'     => 'Siguiente &raquo;',
+    'previous' => '&laquo; Anterior',
+];